Well rat snakes and corn snakes are actually very close relatives to each others. In fact a corn snake is a sub category of a rat snake.
If you ask the people here.....the answers would definately be biased.....as this is actually a corn snake forum....
I would say that a rat snake and a corn snake, I would preferablily choose a corn snake. Firstly, I don't really like the eyes of a rat snake. Secondly, corn snakes has more morph variations in them. Well rats have a lot of different morphs too but then corns has more. Thirdly, corn snakes are known to be a bit more tame compared to a rat snake. Forthy, corns are smaller in length wise compoared to rats. Rats around 6-7 feet and corns around 4-6 feet. But then 6 feet for corns is really abnormal already.
I would think that you are a beginner at this snake stuff right? If I am wrong, then why don't you just choose the one that you look by apprearance. Some of the rat snakes looks really nice, like the mandarin rats and rhino rats are super nice (in my opinion). But if you are new to snakes, a corn is more prefered as they are known to be tame and docile and are also known as 'beginner snakes'.
Hope this helped and tell us what you got at the end.
Good Luck and Happy Herping!
Also welcome to the herp society if you are new!
